Table 10. DIMM population sequence for independent memory mode (continued)
DIMM installation order
Independent mode with memory
mirroring disabled
Independent mode with memory
mirroring enabled
10 DIMM connector 5 DIMM connectors 4 and 18
11 DIMM connector 2 DIMM connectors 3 and 13
12 DIMM connector 11 DIMM connectors 12 and 22
13 DIMM connector 14
14 DIMM connector 23
15 DIMM connector 20
16 DIMM connector 17
17 DIMM connector 7
18 DIMM connector 4
19 DIMM connector 3
20 DIMM connector 12
21 DIMM connector 13
22 DIMM connector 22
23 DIMM connector 21
24 DIMM connector 18
Memory mirroring in independent memory mode
This topic describes using the memory mirroring feature in independent memory mode.
To enable the memory mirroring feature in independent memory mode through the Setup utility, select
System Settings → Memory → Memory Mode. For more information, see “Using the Setup utility” on page
123. For more information and notes about installing DIMMs, see “Installing a memory module” on page 46
and “Independent memory mode” on page 53..
Consider the following information when using the memory mirroring feature in independent memory mode:
• Independent memory mode provides the most efficient performance.
• You can populate DIMMs in any order and there are no matching requirements. However, the DIMM
population sequence in the following table will provide the best performance when operating in the
supported memory modes.
• When you operate in this mode, the memory channel operates at twice the DDR3 data rate.
• Single-device data correction (SDDC) is supported for x4 SDRAM technology.
The following table lists the installation sequence for memory mirroring in independent mode:
Table 11. DIMM population sequence with memory mirroring enabled or disabled in independent memory mode
DIMM installation order
Independent mode with memory
mirroring disabled
Independent mode with memory
mirroring enabled
1 DIMM connector 9 DIMM connectors 9 and 19
2 DIMM connector 6 DIMM connectors 6 and 16
3 DIMM connector 1 DIMM connectors 1 and 15
4 DIMM connector 10 DIMM connectors 10 and 24
54 System x3850 X6 and x3950 X6 Installation and Service Guide
To Next Page
Loading...
